Figure 1252.Seal replacement and piston return adjustment.Figure 12-52 shows the various steps involved indrive pin to force the adjusting pins through their gripsreplacing the piston seals and adjusting the returnand remove the pistons from the housing. Make sure thatmechanism. The internal wrenching bolts holding thethe drive pin is centered on the adjusting pinto preventcylinder housing to the carrier and backplate aredamaging the adjusting pin packings and grips.removed (view A). The cylinder housing is placed underNext, cut the lockwire on the locknut. Use thea press, as illustrated in view B. Use the press and thethreaded bushing wrench, illustrated in view C, to12-58